Fountain pen



July 20, A1937. LARSEN Ei' Al.

. FOUNTAIN PEN Filed April 6, 1935 2 Sheets-Sheet 1 ATTORNEYJ.

'G. LARSEN ET AL July 20, 1937.

FQUNTAIN PEN Fi'led April e, 1935 n 2 sheets-sheet 2 Patented July .20,1937 UNI-TED. STATESI PATENT OFFICE FOUNTAIN PEN Gabriel Larsen,

Springfield, and Henry `N.

poration of New York Application April 6, 1935, Serial No. 15,044

11 Claims.

This invention relates to a novel and improved form of fountain pen, thenovel features of which will be best understood from the followingdescription and the annexed drawings, in which we have shown a selectedembodiment of the invention and in which:

Fig. 1 is a longitudinal View of a fountain pen constructed according tothe invention;

Fig. 2 is a vertical section taken at right angles to Fig. l on agreatly enlarged scale;

Fig. 3 is a View similar to Fig. 2 but showing the parts in differentpositions;

Fig. 4.- is a section on the line 4-4 of Fig. 2;

Fig. 5 is a section on the line 5--5 of Fig. 3;

Fig. 6 is a view similar to Figs. 2 and 3 but showing the parts in stillother positions;

Fig. 7 is an exploded view of the parts appearing in Fig. 6;

Fig. 8 is a fragmentary View of some of the parts appearing in Fig. 6and showing a slight modification;

Fig. 9 is a view of part of the structure appearing in Fig. 2 as seenfrom the right of that figure.;

Fig. 10 is a fragmentary View on the same plane as Fig. 6 but showing adifferent construction of plug.

The invention relates to the l'type of pen shown, for example, in thepatent to-`Tay1or,-802,668, although certain features claimed herein maybe employed with other types of pen Where found suitable.

In the illustrated embodiment, We have shown the pen as comprising abarrel. having two sections I and 2 disposed coaxially with each other,and each detachably secured to a plug 3 which has an outwardly extendingflange -4 against which the adjacent edges of thewalls of the two barrelsections engage.

The plug has tWo parts, namely, an outer part 5 and an inner part `6having an opening 'I therethrough. The plug thus forms a partitionbetween an ink reservoir 8 and a pum-p chamber 9, and the pump in thechamber'Sis in the form of `a flexible -or collapsible sac I which hasits neck VI I received between the inner and outer parts of the plug 3,with the opening 'I communi- .eating with the reservoir 8 and with theinterior of the sac.

The outer part 5 ofthe plugmay be threaded into engagementwith the Wallof thebarrel section I, as indicated at I2, and may have a Atightfrictional `t with the Wall of the barrel section 2, as shown in Figs. 2and 6, or it may likewise have threaded engagement therewith, asindicated at I3 in Fig. 8. If the latter construction (Cl. 1Z0-46) isused, the threads at I2 and I3 should be of opposite hand so that onesection may be unscrewed without disturbing the other. The flange 4 hasthe same diameter as the sections l and 2, and the contour of the edgeof this flange will conform to the contour of those sections so as toform a continuation thereof.

The inner part 6 of the plug is provided with an outwardly extendingperipheral shoulder Ill cooperating with a similar outwardly extendingshoulder I on the outer part to clamp therebetween the edge portion ofthe neck II of the sac. These shoulders are preferably tapered, asshown, so that as the Yinner part is screwed into the outer part, theneck will be securely wedged and clamped between the two parts. The plugand sac may then be treated'as a-unit for removal from the barrel, andthe sac may be removed from the plug for replacement when foundnecessary. The inner part E is provided with a y slot I Iiv forengagement with a screw driver, to aid in removal and replacement of thesac.

We have shown a vent tube Il disposed in the ink reservoir B andextending from a point .adjacent the opening 'I to a point beneath thepen point I3. Usually, sucha tube will communicate with the feeddisposed beneath the pen point, as

is well known in the art, and no detailed showing of that arrangement isthought necessary.

In pens of the general type shown, the reservoir 8 may be filled bycollapsing and expansion of the sac Il). Sometimes this has been done byhand, the user employing his fingers to squeeze the sac and then releaseit. When the sac is squeezed, air is forced therefrom through the venttube Il and out beneath the point I8. When the pressure on the sac isreleased, ink will be forced into the reservoir 8. This operation may berepeated as many times as is necessary toV fill the reservoir or even tocause ink to flow into the sac.

Not only has this operation been performed by hand, but various pumpmechanisms have been devised for the' purpose. We. shall now describe anovel form of mechanism for collapsing the sac and permitting it toexp.and.

The barrel section 2 is provided with an elongated opening I9 ,in onewall thereof, in which is disposed a box 20 of sheet material andwhichmay be constructed to accord With boxes used to support the fillinglevers now in common use.

Extending across the opening and supported in the side Walls of the boxis a pivot 2| which may f be in the form of a pin having its endsmounted in the walls 22 of the box.

Mounted at one end upon the pivot 2l is a lever 23 and having its otherend slidably engaging a bar 24 contacting with the wall of the sac IB.This bar may be of the channel section best shown in Fig. 4, and thelever may conveniently be made of a single piece of sheet metal foldedon itself and having oppositely extending tongues 25 at its endsdisposed between the bottom 26 and the top 2l of the channel. By thisconstruction, as the lever depresses the bar, it may move along it, and,similarly, when the lever returns to initial position, it may slidealong the k bar, as will be evident.

To actuate the lever 23, we provide a handle 28 mounted at one end uponthe pivot 2i and having its other end extending towards one end of theopening I9, preferably the end opposite that end of the same openingwhich is normally occupied by the end ofthe lever 23.

' The parts normally occupy the position shown in Fig. 2, and when it isdesired to actuate the pump, the handle 28 may be moved to some suchposition as shown in Fig. 6, which movement is an idle one. The handleis shown as made of a single piece of sheet .metal folded on itself inthe same manner as the lever 23, and part of the fold is cut away toform a transverse shoulder 29, on opposite sides of which are the Wings353 through which passes the pivot 2l. The handle may be freely movedfrom the position shown in Fig. 2 to that shown in Fig. 6 withoutactuating the lever. When the shoulder 29, however, engages the top ofthe lever as shown in Fig. 6, and the handle is rotated further on thepivot, then it will be obvious that the lever 23 will be actuated Yinwardly until it reaches some such position as shown in Fig. 3. Duringthis movement, the lever will slide along the channel bar, and when thepressure on the handle is released, the lever and handle will return tothe position shown in Fig. 6, by the resilience of the sac. Theoperation may be repeated as many times as desired, and then the handlemay be returned to its normal inoperative position shown in Fig. 2,whereV it may be releasably held by known means, indicated asprojections 3|, on the box walls received in depressions 32 on thehandle. A stop 33 may be used, if desired, to positively stop movementof e the handle.

As the lever 23 moves from the position of Fig. 3

to that of Fig. 6, the tongues 25 slide along the channel bar, aspreviously noted. In order to limit sliding of the bar 24 downwardly ortowards the point, we strike up a portion of the bottom 26 of the bar toform a lug or stop 34 adjacent the point 35 where the top of the channelends, to

engage the end of the lever.

In theYo-peration of the handle and lever described above, the return ofthe two from the position shown in Fig. 3 to that shown in Fig. 6

is caused by the resilience of the sac alone. However, we find itdesirable to provide a positive means for causing this movement, andtofthat end we provide the handleY with a projection 36 adapted to entera recess or depression 31 in the lever to temporarily lock the two;parts together in the same manner as the projections 3| and depressions32 cooperate. Y The engagement of the projection 36 and depression 31forms a temporary positive lock between the handle 28 and lever 23, sothat if the thumb nail is placed under the end of the handle whenit isin the position of Fig. 3 and then the handle is lifted Aso as to rotatein a counterclockwise direction, such rotation will i other.

aoeaeve cmry with it the lever 23 until the handleand lever reach theposition shown in Fig. 6. Then continued rotation of the handle on itspivot will move the handle to the position shown in Fig. 2, furtherrotation of the lever 23 being prevented by engagement of its tongues 25with the top 2l of the channel.

During the several movements of the lever which will ordinarily berequired for pumping ink into the reservoir, the handle and lever may bepositively moved as one member, between the positions of Fig. 3 and Fig.6, and then when the pumping is completed, the handle may be moved tothe position' of Fig. 2

VReferring now to Fig. 10, we have shown therein a modified form of theplug shown in Fig. 6. The plug shown in Fig. l0 comprises a cup 38having a ange 39 received between the barrel sections l and 2. The cupmay be threaded to one of the sections, here shown as the section 2, and

it may'have a close frictional contact with'the It is of course obviousthat it may be threaded to both or have frictional contact with both. Inthe bottom of the cup is a vent communicating with a vent li in aninsert @2 which has a head d3 resting upon the bottom 44 of the cup.

The wall of the cup forms a sleeve in contact with the adjacent walls ofthe sections l and 2, and between that sleeve and the wall of the insertis disposed an linner sleeve 'which is threaded to the outer sleeve andwhich clamps the neck i l of the sac against the insert in the samemanner as this neck is clamped between the inner and outer sections ofthe plug 3. The inner sleeve is provided with a slot 43 for engagementwith a suitable tool for turning it. By this arrangement the sleeve maybe readily removed to permit replacementrof the sac from the rear or topof the plug, without disturbing the ink-tight joint at 4l.

While we have shown the invention as embodied in a specic form, it is tobe understood that various changes in details maybe made withoutdeparting from the scope of theY invention, as dened by the appendedclaims.

We claim:

l. A fountain pen comprising a barrel having therein an ink reservoirand a pump chamber disposed in line with each other, a flexible pump sacin said chamber and communicating with said reservoir, a bar engagingone side of said sac, said chamber having a wall extending generallyparallel to said side of the sac and having an elongated openingtherein, a pivot extending across said opening, a lever having one endpivotally mounted on said pivot and the other end normally disposedadjacent one end of said openopening, means on the handle adapted toengage the lever after outward movement of the handle to a predeterminedextent, to actuate said lever to press said bar against the sac, andmeans to ydetachably hold said lever and handle together after saidengagement.

2. A fountain pen comprising a barrel, a plug disposed on the interiorof the barreland formed of an inner1 and outer part, a flexible sachaving a neck received between said parts, means on said parts forsecuring them together and clampingV said neck therebetween, said innerpart having an openingV therethrough communicating with said sac, andother means for securing said outer part to the barrel.

3. A fountainl pen comprisinga barrel, a plug` ing, a handle having oneend pivotally mounted. on said pivot independently of said lever and Ynormally extendingtowards the other end of said disposed on the interiorof the barrel and formed of an inner and outer part, said outer parthaving a central hole therethrough, the wall of said hole having anoutwardly extending shoulder, a flexible sac having a neck disposedwithin said hole in engagement with said shoulder, means on said partsfor securing them together and clamping said neck therebetween, saidinner part having an opening therethrough communicating with said sac,and other means for securing said outer part to the barrel.

4. A fountain pen comprising a barrel, a plug disposed on the interiorof the barrel and formed of an inner and outer part, said outer parthaving a central hole therethrough, the wall of said hole having anoutwardly extending shoulder, a flexible sac having a neck disposedwithin said hole in engagement with said shoulder, threads on said partsto secure them` together and to clamp said neck therebetween, said innerpart having an opening therethrough communicating with said sac, andmeans other than said threads for securing said outer part to thebarrel.

5. A fountain pen comprising a barrel having two coaxial sections, aplug disposed within the barrel and detachably engaging each of saidsections, said plug having an outer part with an outwardly extendingflange disposed between adjacent edges of the barrel walls and having acentral hole therethrough, an inner part of the plug disposed withinsaid hole, a flexible sac having a neck disposed between said parts, andmeans for securing said parts together with said neck clampedtherebetween, said inner part having an opening therethroughcommunicating with said sac.

6. A fountain pen comprising a barrel having therein an ink reservoirand a pump chamber disposed in line with each other, a iiexible pump sacin said chamber and communicating with said reservoir, a bar engagingone side of said sac, said chamber having a wall extending generallyparallel to said side of the sac and having an opening therein, a leverpivotally mounted within said opening and having one end thereofengaging said bar, a handle mounted on said wall and adapted to actuatesaid lever to press said bar against the sac, and means forming atemporary lock to hold said lever and handle together during operationof the lever.

7. A fountain pen comprising a barrel having an elongated collapsiblesac therein, said barrel having a wall extending generally parallel tosaid sac, a bar engaging one -side of said sac, said wall having anelongated opening therein with a pivot extending across it, a leverhaving one end pivotally mounted in said pivot and the other endnormally disposed adjacent one end of said opening, a handle having oneend pivotally mounted on said pivot and normally extending towards theother end of said opening, means on the handle adapted to engage thelever after movement of the handle to a predetermined extent, toAactuate said lever to press' said bark against the sac, and meansforming a temporary lock between the handle and the lever when saidhandle has been moved to said predetermined extent.

8. A fountain pen comprising a barrel having an ink reservoir and a pumpchamber therein, a plug within the barrel forming a partition betweensaid reservoir and chamber and comprising a cup with its bottom adjacentthe reservoir and its top adjacent the chamber and having a wallextending lengthwise of the barrel, an insert disposed vvithin said cupand having a head engaging the bottom thereof, a sleeve threaded Withinthe cup wall, and a sac within the chamber and having a neck betweensaid ring and insert and flared outwardly into engagement with saidinsert head, whereby the sac neck may be clamped against said head byrotation of the sleeve, said bottom and insert having aligned ventstherethrough.

9. A fountain pen comprising a barrel having an ink reservoir and a pumpchamber therein, a plug within the barrel forming a partition betweensaid reservoir and chamber and comprising a cup with its bottom adjacentthe reservoir and its top adjacent the chamber and having a wallextending lengthwise of the barrel, a sac having a neck disposed within-said cup, and means for detachably securing said neck in said cup.

10. A fountain pen comprising a barrel having an ink reservoir and apump chamber therein, a

plug within the barrel forming a partition between said reservoir andchamber and comprising a cup with its bottom adjacent the reservoir andits top adjacent the chamber and having a Wall extending lengthwise ofthe barrel, a sac having a neck disposed within said cup, means fordetachably securing said neck in said cup, said barrel being formed insections, with one section enclosing said sac, and means for detachablysecuring said sac-enclosing section to said plug independently of thesac-securing means, said plug having a vent connecting said reservoirwith the interior of said sac.

11. A fountain pen comprising a barrel having an ink reservoir and apump chamber therein, a plug Within the barrel forming a partitionbetween said reservoir and chamber, said barrel being formed in sectionswith one section forming said chamber, a sac within said chamber andhaving a neck, means for detachably securing said section to said plug,a projection on said plug extending within the neck of said sac, andmeans engaging the outer surface of the sac neck to clamp said neckagainst said projection, said last-named means being operable to attachor detach the sac to or from the plug after removal of said section,said plug having a vent connecting said reservoir with the interior ofsaid sac.

GABRIEL LARSEN. HENRY N. BRAIECHLE.

